[Joe Staff]

pawn Код:

//place outside of any callbacks, most commonly on the top below #includes
IsPlayerName(playerid,name[])
{
  new tmp[MAX_PLAYER_NAME];
  GetPlayerName(playerid,tmp,sizeof(tmp));
  if(!strcmp(tmp,name,false))return 1;
  return 0;
}

//use
public OnPlayerConnect(playerid)
{
  if(IsPlayerName(playerid,"[BaD]AssMcGee"))
  {
    SendClientMessage(playerid,0xFF0000FF,"YOU'RE FAT!");
  }
  return 1;
}

There you go, untested.